建国以来,全国公路建设发展迅速,公路通车里程由建国初期的8万公里上升到1991年底的105万公里。但仍滞后于国民经济的发展,不仅数量少、标准低、质量差的问题更为突出,而且公路的密度及铺装率均远远低于发达国家的水平。全国现有105万公里公路中,二级以上的公路仅占5 Since the founding of the People’s Republic of China, the country’s highway construction has been developing rapidly. The mileage of roads opened to traffic increased from 80,000 kilometers in the early days of the founding of New China to 1,050,000 kilometers at the end of 1991. However, it still lags behind the development of the national economy. Not only the quantity but also the standard is low. The problems of poor quality are even more prominent. The density and pavement rate of roads are much lower than those of developed countries. Of the existing 1.05 million kilometers of highways in the country, only 5 are highways above Grade II